Add vim map to show cursor

I often want to see how things line up or highlight the
current line. Since I only need it for a short time,
use a single "crosshair" map.
Extract togglequickfix into fixquick
Always expand tab for vimscript
Add command for SmartGrepToggle

Function is still available since command only toggles (doesn't accept
an argument).
Make quick grep search map convert regex

I often use g* to find a word which prepends \V, but that's not
recognized by grep. This uses notgrep's smart conversion to ensure that
we have the right regex format.

If notgrep isn't loaded, then fallback to just the raw query.
Move generic search functionality to searchsavvy

Extract search code into a new plugin: searchsavvy.

Some config is special to me, so I am keeping config_search.